What makes a quality microphone in a headset? somethat that doesn't pick
up the cockpit noise, but still transmits your voice clearly?

I've searched for the best performing mic and have found that
the Sigtronics M-80 and M-81 mics to be the best at cancelling
out high noise, yet not muffling your voice too much. Not surprising
as this is what they were designed for... open cockpits with a
screaming 2-stroke engine 5 feet away.

A little steep at $90 from
http://www.sportys.com/acb/showdetl....ID=5970&DID=19

Alternatively, Sigtronics makes headsets for EMS/Fire rescue. You
can find a fire supply liquidator on ebay selling headsets with
a 'hard wired' M-81 on a flex boom for $50. Easy to remove the
boom with attached mic and mount on your existing headset. Search
for 'Sigtronics SE-8'

for example:

http://cgi.ebay.com/Sigtronics-Noise...QQcmdZViewItem



Dean A. Scott, mfa
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School of Visual Art and Design
southern adventist university
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http://www.southern.edu/~dascott